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On Darwin's Theory Of Natural Selection Beginning of Paper AP Biology Whether it is Lamarck's theory that evolution is driven by an innate tendency towards greater complexity, Darwin's theory of natural selection, or the belief that the evolution of plant and animal life is controlled by a higher being, the process of evolution cannot .... Middle of Paper .... reefs (1842), and volcanic islands (1844), but his greatest biological observations were those pertaining to his theory of evolution. Darwin's findings begin in the Galapagos Islands where he noticed a wide array of finches whose beaks were different sizes. He believed that the physical conditions on the island did not affect the birds' beaks, but it was the birds' feeding habits. For instance, the birds with the large, powerful beaks ate large seeds, while the birds with the small or fine beaks, ate small seeds or insects. He .... 655 words | 3 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95